Effects of pre-oxidation on the corrosion behavior of pure Ti under coexistence of solid NaCl deposit and humid oxygen at 600 °C: the diffusion of chlorine.
作者信息
Fan Lei, Liu Li, Lv Yuhai, Wang Hao, Fu Anqing, Yuan Juntao, Li Ying, Wang Fuhui, Yin Chengxian
机构信息
State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials, CNPC Tubular Goods Research Institute, NO. 89, Jinyeer Rode, Xi'an, 710077, Shaanxi, China.
Institute of Metal Research, Chinese Academy of Sciences, NO. 62, Wencui Road, Shenyang, 110016, Liaoning, China.
出版信息
Sci Rep. 2020 Oct 1;10(1):16291. doi: 10.1038/s41598-020-73034-y.
The effect of pre-oxidation on the corrosion behavior of pure Ti covered with a solid NaCl deposit in the humid O flow at 600 °C is studied. The oxide scale, formed by pre-oxidation, protects the substrate from the NaCl induced corrosion during the initial stage. However, the corrosion of the pre-oxidized sample is severely accelerated by solid NaCl after an incubation period. The chlorine, generated from the decomposition of solid NaCl, diffuses into the oxide/substrate interface as ions during the incubation period, which was observed by ToF-SIMS. The chlorine at the oxide/substrate interface induces the fast corrosion after the incubation period although the pre-oxidation scale is complete and compact.
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